One of the absolute rules I learned in the war was, don't know anything you don't need to know, because if you ever get caught they will get it out of you. ↗
The rule of the game was never assume that anybody, however honorable, would be able to stand up under torture. If Mr. X, who knew where I was, was caught for some reason, I should move. ↗
I once heard two ladies going on and on about the pains of childbirth and how men don't seem to know what real pain is. I asked if either of them ever got themselves caught in a zipper. ↗